From 11f8b2b69d32d43a6d9b45c60c1fee48ab91f440 Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher Date: Thu, 11 Sep 2014 14:29:05 +0200 Subject: [PATCH] drbd: Use better variable names Rename local variable 'ds' to 'disk_state' or 'data_size'. 'dgs' to 'digest_size' Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe --- drivers/block/drbd/drbd_int.h | 6 ++-- drivers/block/drbd/drbd_main.c | 28 +++++++++--------- drivers/block/drbd/drbd_receiver.c | 46 +++++++++++++++--------------- drivers/block/drbd/drbd_state.c | 18 ++++++------ 4 files changed, 49 insertions(+), 49 deletions(-) diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 1a000016ccdf..9e1288e4148c 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -2109,7 +2109,7 @@ static inline bool is_sync_state(enum drbd_conns connection_state) static inline void put_ldev(struct drbd_device *device) { - enum drbd_disk_state ds = device->state.disk; + enum drbd_disk_state disk_state = device->state.disk; /* We must check the state *before* the atomic_dec becomes visible, * or we have a theoretical race where someone hitting zero, * while state still D_FAILED, will then see D_DISKLESS in the @@ -2122,10 +2122,10 @@ static inline void put_ldev(struct drbd_device *device) __release(local); D_ASSERT(device, i >= 0); if (i == 0) { - if (ds == D_DISKLESS) + if (disk_state == D_DISKLESS) /* even internal references gone, safe to destroy */ drbd_device_post_work(device, DESTROY_DISK); - if (ds == D_FAILED) + if (disk_state == D_FAILED) /* all application IO references gone. */ if (!test_and_set_bit(GOING_DISKLESS, &device->flags)) drbd_device_post_work(device, GO_DISKLESS); diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 9b465bb68487..973c185c9cfe 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1622,13 +1622,13 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request * struct drbd_socket *sock; struct p_data *p; unsigned int dp_flags = 0; - int dgs; + int digest_size; int err; sock = &peer_device->connection->data; p = drbd_prepare_command(peer_device, sock); - dgs = peer_device->connection->integrity_tfm ? - crypto_hash_digestsize(peer_device->connection->integrity_tfm) : 0; + digest_size = peer_device->connection->integrity_tfm ? + crypto_hash_digestsize(peer_device->connection->integrity_tfm) : 0; if (!p) return -EIO; @@ -1659,9 +1659,9 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request * /* our digest is still only over the payload. * TRIM does not carry any payload. */ - if (dgs) + if (digest_size) drbd_csum_bio(peer_device->connection->integrity_tfm, req->master_bio, p + 1); - err = __send_command(peer_device->connection, device->vnr, sock, P_DATA, sizeof(*p) + dgs, NULL, req->i.size); + err = __send_command(peer_device->connection, device->vnr, sock, P_DATA, sizeof(*p) + digest_size, NULL, req->i.size); if (!err) { /* For protocol A, we have to memcpy the payload into * socket buffers, as we may complete right away @@ -1674,23 +1674,23 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request * * out ok after sending on this side, but does not fit on the * receiving side, we sure have detected corruption elsewhere. */ - if (!(req->rq_state & (RQ_EXP_RECEIVE_ACK | RQ_EXP_WRITE_ACK)) || dgs) + if (!(req->rq_state & (RQ_EXP_RECEIVE_ACK | RQ_EXP_WRITE_ACK)) || digest_size) err = _drbd_send_bio(peer_device, req->master_bio); else err = _drbd_send_zc_bio(peer_device, req->master_bio); /* double check digest, sometimes buffers have been modified in flight. */ - if (dgs > 0 && dgs <= 64) { + if (digest_size > 0 && digest_size <= 64) { /* 64 byte, 512 bit, is the largest digest size * currently supported in kernel crypto. */ unsigned char digest[64]; drbd_csum_bio(peer_device->connection->integrity_tfm, req->master_bio, digest); - if (memcmp(p + 1, digest, dgs)) { + if (memcmp(p + 1, digest, digest_size)) { drbd_warn(device, "Digest mismatch, buffer modified by upper layers during write: %llus +%u\n", (unsigned long long)req->i.sector, req->i.size); } - } /* else if (dgs > 64) { + } /* else if (digest_size > 64) { ... Be noisy about digest too large ... } */ } @@ -1711,13 +1711,13 @@ int drbd_send_block(struct drbd_peer_device *peer_device, enum drbd_packet cmd, struct drbd_socket *sock; struct p_data *p; int err; - int dgs; + int digest_size; sock = &peer_device->connection->data; p = drbd_prepare_command(peer_device, sock); - dgs = peer_device->connection->integrity_tfm ? - crypto_hash_digestsize(peer_device->connection->integrity_tfm) : 0; + digest_size = peer_device->connection->integrity_tfm ? + crypto_hash_digestsize(peer_device->connection->integrity_tfm) : 0; if (!p) return -EIO; @@ -1725,9 +1725,9 @@ int drbd_send_block(struct drbd_peer_device *peer_device, enum drbd_packet cmd, p->block_id = peer_req->block_id; p->seq_num = 0; /* unused */ p->dp_flags = 0; - if (dgs) + if (digest_size) drbd_csum_ee(peer_device->connection->integrity_tfm, peer_req, p + 1); - err = __send_command(peer_device->connection, device->vnr, sock, cmd, sizeof(*p) + dgs, NULL, peer_req->i.size); + err = __send_command(peer_device->connection, device->vnr, sock, cmd, sizeof(*p) + digest_size, NULL, peer_req->i.size); if (!err) err = _drbd_send_zc_ee(peer_device, peer_req); mutex_unlock(&sock->mutex); /* locked by drbd_prepare_command() */ diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 9342b8da73ab..3ae769e671e8 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1371,9 +1371,9 @@ int drbd_submit_peer_request(struct drbd_device *device, struct bio *bio; struct page *page = peer_req->pages; sector_t sector = peer_req->i.sector; - unsigned ds = peer_req->i.size; + unsigned data_size = peer_req->i.size; unsigned n_bios = 0; - unsigned nr_pages = (ds + PAGE_SIZE -1) >> PAGE_SHIFT; + unsigned nr_pages = (data_size + PAGE_SIZE -1) >> PAGE_SHIFT; int err = -ENOMEM; if (peer_req->flags & EE_IS_TRIM_USE_ZEROOUT) { @@ -1388,7 +1388,7 @@ int drbd_submit_peer_request(struct drbd_device *device, list_add_tail(&peer_req->w.list, &device->active_ee); spin_unlock_irq(&device->resource->req_lock); if (blkdev_issue_zeroout(device->ldev->backing_bdev, - sector, ds >> 9, GFP_NOIO)) + sector, data_size >> 9, GFP_NOIO)) peer_req->flags |= EE_WAS_ERROR; drbd_endio_write_sec_final(peer_req); return 0; @@ -1426,12 +1426,12 @@ next_bio: ++n_bios; if (rw & REQ_DISCARD) { - bio->bi_iter.bi_size = ds; + bio->bi_iter.bi_size = data_size; goto submit; } page_chain_for_each(page) { - unsigned len = min_t(unsigned, ds, PAGE_SIZE); + unsigned len = min_t(unsigned, data_size, PAGE_SIZE); if (!bio_add_page(bio, page, len, 0)) { /* A single page must always be possible! * But in case it fails anyways, @@ -1446,11 +1446,11 @@ next_bio: } goto next_bio; } - ds -= len; + data_size -= len; sector += len >> 9; --nr_pages; } - D_ASSERT(device, ds == 0); + D_ASSERT(device, data_size == 0); submit: D_ASSERT(device, page == NULL); @@ -1591,24 +1591,24 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector, const sector_t capacity = drbd_get_capacity(device->this_bdev); struct drbd_peer_request *peer_req; struct page *page; - int dgs, ds, err; - unsigned int data_size = pi->size; + int digest_size, err; + unsigned int data_size = pi->size, ds; void *dig_in = peer_device->connection->int_dig_in; void *dig_vv = peer_device->connection->int_dig_vv; unsigned long *data; struct p_trim *trim = (pi->cmd == P_TRIM) ? pi->data : NULL; - dgs = 0; + digest_size = 0; if (!trim && peer_device->connection->peer_integrity_tfm) { - dgs = crypto_hash_digestsize(peer_device->connection->peer_integrity_tfm); + digest_size = crypto_hash_digestsize(peer_device->connection->peer_integrity_tfm); /* * FIXME: Receive the incoming digest into the receive buffer * here, together with its struct p_data? */ - err = drbd_recv_all_warn(peer_device->connection, dig_in, dgs); + err = drbd_recv_all_warn(peer_device->connection, dig_in, digest_size); if (err) return NULL; - data_size -= dgs; + data_size -= digest_size; } if (trim) { @@ -1661,16 +1661,16 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector, ds -= len; } - if (dgs) { + if (digest_size) { drbd_csum_ee(peer_device->connection->peer_integrity_tfm, peer_req, dig_vv); - if (memcmp(dig_in, dig_vv, dgs)) { + if (memcmp(dig_in, dig_vv, digest_size)) { drbd_err(device, "Digest integrity check FAILED: %llus +%u\n", (unsigned long long)sector, data_size); drbd_free_peer_req(device, peer_req); return NULL; } } - device->recv_cnt += data_size>>9; + device->recv_cnt += data_size >> 9; return peer_req; } @@ -1708,17 +1708,17 @@ static int recv_dless_read(struct drbd_peer_device *peer_device, struct drbd_req struct bio_vec bvec; struct bvec_iter iter; struct bio *bio; - int dgs, err, expect; + int digest_size, err, expect; void *dig_in = peer_device->connection->int_dig_in; void *dig_vv = peer_device->connection->int_dig_vv; - dgs = 0; + digest_size = 0; if (peer_device->connection->peer_integrity_tfm) { - dgs = crypto_hash_digestsize(peer_device->connection->peer_integrity_tfm); - err = drbd_recv_all_warn(peer_device->connection, dig_in, dgs); + digest_size = crypto_hash_digestsize(peer_device->connection->peer_integrity_tfm); + err = drbd_recv_all_warn(peer_device->connection, dig_in, digest_size); if (err) return err; - data_size -= dgs; + data_size -= digest_size; } /* optimistically update recv_cnt. if receiving fails below, @@ -1738,9 +1738,9 @@ static int recv_dless_read(struct drbd_peer_device *peer_device, struct drbd_req data_size -= expect; } - if (dgs) { + if (digest_size) { drbd_csum_bio(peer_device->connection->peer_integrity_tfm, bio, dig_vv); - if (memcmp(dig_in, dig_vv, dgs)) { + if (memcmp(dig_in, dig_vv, digest_size)) { drbd_err(peer_device, "Digest integrity check FAILED. Broken NICs?\n"); return -EINVAL; } diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c index c35c0f001bb7..84b11f887d73 100644 --- a/drivers/block/drbd/drbd_state.c +++ b/drivers/block/drbd/drbd_state.c @@ -136,50 +136,50 @@ enum drbd_role conn_highest_peer(struct drbd_connection *connection) enum drbd_disk_state conn_highest_disk(struct drbd_connection *connection) { - enum drbd_disk_state ds = D_DISKLESS; + enum drbd_disk_state disk_state = D_DISKLESS; struct drbd_peer_device *peer_device; int vnr; rcu_read_lock(); idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { struct drbd_device *device = peer_device->device; - ds = max_t(enum drbd_disk_state, ds, device->state.disk); + disk_state = max_t(enum drbd_disk_state, disk_state, device->state.disk); } rcu_read_unlock(); - return ds; + return disk_state; } enum drbd_disk_state conn_lowest_disk(struct drbd_connection *connection) { - enum drbd_disk_state ds = D_MASK; + enum drbd_disk_state disk_state = D_MASK; struct drbd_peer_device *peer_device; int vnr; rcu_read_lock(); idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { struct drbd_device *device = peer_device->device; - ds = min_t(enum drbd_disk_state, ds, device->state.disk); + disk_state = min_t(enum drbd_disk_state, disk_state, device->state.disk); } rcu_read_unlock(); - return ds; + return disk_state; } enum drbd_disk_state conn_highest_pdsk(struct drbd_connection *connection) { - enum drbd_disk_state ds = D_DISKLESS; + enum drbd_disk_state disk_state = D_DISKLESS; struct drbd_peer_device *peer_device; int vnr; rcu_read_lock(); idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { struct drbd_device *device = peer_device->device; - ds = max_t(enum drbd_disk_state, ds, device->state.pdsk); + disk_state = max_t(enum drbd_disk_state, disk_state, device->state.pdsk); } rcu_read_unlock(); - return ds; + return disk_state; } enum drbd_conns conn_lowest_conn(struct drbd_connection *connection) -- 2.39.5